Crushing-rolls.



R. BERNHARD.

GRUSHING ROLLS. .APFLIOATIOH rILBD Dnoflz, 1907.

956,878. Patented May 3, 1910.

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:mwiw n. alumna co, Pho? oooooooooo Pm n C UNITED STATES PATENT OFFICE.

RICHARD 4BERNHARD, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO POWER AND MINING MACHINERY COMPANY, 0F CUIDAHY, WISCONSIN.

CBUSHING-ROLLS.

Specification of Letters Patent.

Application led December 12, 1907.

Patented May 3, 1910.

Serial No. 406,229.

To all whom it may concern: j

Be it known that I, RICHARD BERNHARD, citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Crushing- Rolls, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in crushing rolls of the class used for grinding rock, reducing ores, and materials of that class.-

It relates more particularly to improvements by means of which one or both of the rolls of a pair can be moved longitudinally from one osition to another and can be firmly fixe in position after adjustment. Such longitudinal adjustment is desirable because the flow of the ore rock or the like between the rolls tends to groove the roll shells and if means for longitudinal adj ustment is provided the relative positions of the shells may be so changed that the grooving can be, to a large extent worn off by the action of the material that 1s being crushed. Such adjustment is also desirable to provide for the proper alinement of new shells when they are first put on, inaccuracies or variation-s inthe machining of the taper-bore of the shells causing different shells to take different positions on the shaft.

In the accompanying drawings, Figure l is a top plan view of a crushing mechanism provided with my improvements. Fig. 2 is a side elevation of the same. Fig. 3 is a sectional view of the adjusting devlces on a relatively large scale and showing also some of the adjacent parts, the section being taken on the line w-a' of Fig. 2. Fig. l'is a face view of the parts shown in Fig. 3. Figs. 5 and 6 are top and face views, respectively, of the adjustment shell. Fig.7 is a erspective kview of one of the parts of the adjusting de vice. Fig. 8 is a face and edge View of one 4of the bearing rings.

In the drawings, I have shown enough of a crusher-roll mechanism to indicate how my improvement can be put to use, but a major part of the mechanism will readily be understood by those skilled in the art, so that it will not be necessary to describe it in detail. Suffice it to note that thecrusher rolls are indicated by B and C mounted upon a base A, the roll B being stationary as concerns movement bodily, while the roll C is movable bodily toward and from the companion roll. Such movement is provided for by mounting the roll C in yieldinfrbearings with which s rings are combine for the purpose Vof ho ding, normally, the movable roll in a predetermined position.

The shaft F of the fixed roll extends longitudinally thereof outward and is mounted in pedestal bearings indicated as entireties at D and D. The bearing D is formed of the lower pedestal part d and a cap cl', these parts being brought into contact on and separable from each other at a plane inclined to the horizontal.

The shaft F is provided with a screwthreaded end-part G, preferably formed by shouldering the shaft as shown at f. In the reduced or threaded part G are formed one or more key-ways g extending parallel to the axis. H indicates an adjustable thrust device having a radially arranged flange L, and a threaded tube or sleeve L, fitted to the thread on the part G of the shaft. In this sleeve there is a keyeway h2 adapted to re ister with the key-way g in the shaft. A ter the thrust device has been put into the desired position, it can be fastened therein immovably b means of the key G. The iange part of the thrust device lies between two abutment walls respectively preventing it from moving either inward or outward along the axis of the shaft, but which permit it to rotate freely. These are provided as follows.

K indicates a shell-like structure having a radially arranged wall 7c and a peripheral wall 7c. The latter is threaded internally, as shown at 7a2, to receive the threaded outer edge of the ring or annular plate L. The outer face of plate L is formed with lugs Z adapted to receive a Spanner bar or other tool adapted to rotate the ring when it is desired to cause it to move in or out along the axis. These lugs also serve as a locking means for the ring as will presently be explained.

The flange part L of the adjustable thrust device is situated in the space or chamber between the ring L and the inner wall 7c. M-M are bearing rings or annular washers interposed between the flange z. and the wall 7c on the one side, and the flange and the adjusting ring L on the other side. These rings M are grooved at m to provide for the circulation of oil and insure a thorough lubrication of the bearing surfaces.

The shell or box-like part K is locked against rotation by means of projections such as the stud-bolts N, secured to the part d of the bearing D, and opposing projections on the part K, these opposing projections in the present instance being radially extending hooks or hooked arms K. When the shell or box-like part is in place with the hooks K on the stud bolts and the securing nuts l are turned home, said shell part is rigidly secured to the pedestal part of the bearing D.

A key-plate O adapted to engage any one of the pairs of lugs Z and drilled at one end to pass over one of the stud-bolts .N and be clamped in position by nuts N constitutes means for eectively looking the plate L, against rotation with respect to the shell K.

By means of sockets at 71.3, the adjusting nut I-I can be engaged by a spanner wrench or the like to shift the flange a, in or out along the shaft.

When it is desired to draw the shaft and the roll toward the right, the nut and flange at L-z. are turned in such way as to travel inward on the thread of the shaft. As the wall 7c of the shell part K constitutes a stationary abutment the eect of this movement is to draw the shaft outward. Prior to thus turning the nut and flange h-L the key or keys Gr are removed to free the nut, and after the adjustment has been made, the key or keys are restored. Vice versa, if it be desired to move the shaft in the opposite direction, the nut and iange are rotated in the opposite way, thus causing pressure to be exerted upon the adjusting plate L. As this plate is locked in the shell K which is rigidly secured to the bearing pedestal, it acts as an abutment and the shaft is shifted inward or toward the left.

'Ihe hooked arms K which I employ to secure the shell K in position are an important feature; inasmuch as it permits the roll and its shaft to be raised bodily from its bearings with the adjustment device intact by simply loosening the securing nuts N.

The shell K is provided on its upper side with a cored extension P having an opening p through which lubricant may be fed to the thrust bearing surfaces of the adjustment device. This opening may be provided with any suitable cover to exclude dust, but 'in the present instance, I have shown at Q a cover composed of a sheet of flexible material, such as rubber belting with a backing Q of metal. The cover is secured at its flexible end so that the opposite end may be raised when it is desired to introduce the lubricant.

Vhat I claim is:

l. In crushing rolls, the combination of the machine frame, a roll shaft, an annular' bearing shell rigidly secured to the frame and having oppositely facing bearing surfaces, and a thrust-collar adjustably secured on the shaft between the said oppositely facing bearing surfaces, said collar having a part exposed to the exterior of said shell, whereby said collar may be engaged and adjusted inwardly or outwardly with respect to the shaft, substantially as set forth.

2. In crushing rolls, the combination of the machine frame, the roll shaft, the annular bearing shell rigidly secured to the frame and having oppositely facing bearing surfaces, the adjustable thrust-collar secured by screw-threads on said shaft between said oppositely facing surfaces, and means for locking the collar in adjusted position, said collar having a part exposed to the exterior of said shell, whereby the collar may be engaged and turned forward or backward to effect longitudinal adjustment of the shaft, substantially as set forth.

3. In crushing rolls, the combination of the machine frame, the roll shaft, the annular bearing shell rigidly secured to the frame and having oppositely facing bearing surfaces, an adjustable thrust-collar secured by screw-threads on said shaft between said oppositely facing surfaces, and meansfor locking the collar in adjusted position, said collar having a hub extension projecting to the exterior of the shell and adapted to be engaged and turned forward or backward to effect a longitudinal adjustment of the shaft, substantially as set forth.

4. In crushing rolls, the combination of the machine frame having sectional roll-supporting bearings, a roll shaft in said bearings, the thrust-collar on the shaft, the bearing shell having oppositely facing bearing surfaces to receive the thrust-collar, and releasable fastening means for holding the shell against axial movement, said shell be* ing free when said fastening means is released to be lifted with the roll shaft from its supporting bearings.

5. In crushing rolls, the combination of the machine frame having sectional rollsupporting bearings, the roll shaft in said bearings, the thrust-collar on said shaft adjacent one of the bearings, the bearing shell having oppositely facing bearingl surfaces to receive said thrust-collar mounted on an end face of the adjacent bearing, the engaging surfaces of the shell and bearing` being constructed to allow free vertical movement of the former, and fastening means to detachably secure the shell rigidly to the bearing, substantially as set forth.'

6. In crushing rolls, the combination of the machine frame having sectional rollsupporting bearings, the roll shaft in said bearings, the thrust bearing for said shaft comprising a collar on the shaft, and a bearing shell having opositely facing bearing surfaces to receive said collar, mounted on the frame, one of the thrust bearing members being axially adjustable to e'ect the longitudinal adjustment of the roll shaft, and releasable fastening means for securing the shell rigidly to the frame, said shell being free, when the fastening is released, to be lifted with the roll shaft from its supporting bearings.

7. In Crushing rolls, the combination of the machine frame, having sectional roll supporting bearings, the roll shaft in said bearings, the thrust bearing for said shaft adjacent one of the supporting bearings and comprising a collar on the shaft, and a bearing shell having oppositely facing bearing surfaces to receive said collar mounted on an end face of the adjacent supporting bearing, one of the thrust bearing members being axially adjustable to effect the longitudinal adjustment of the roll shaft, and fastening means to detachably secure the shell rigidly to said supporting bearing, the engaging surfaces of the shell and bearing being constructed to allow free vertical movement of the former, substantially as set forth.

8. In crushing rolls, the combination of the machine frame having sectional rollaxial movement, said shell being free, when the said fastening means is released, to be lifted with the roll shaft from its supporting bearings.

9. In crushing rolls, the combination of the machine frame, having sectional roll- .l

supporting bearings, the roll shaft in said bearings, the thrust-bearing for said shaft adjacent one of the supporting bearings and comprising an aXiall adjustable colar on the shaft, and a bearing shell having oppositely facing bearing surfaces to recelve said collar mounted on an end face of the adjacent supportinfr bearing, and fastening means to detachably secure the shell rigidly to said supportinn' bearing, the engaging surfaces of the sherll and bearing being constructed to allow free vertical movement of the former, substantially as set forth.

In testimony whereof I aflix my signature, in presence of two witnesses.

RICHARD BERNHARD. Witnesses:

C. II. BAKKER, ALFRED J. KLUG.

ad'ustable collar on 

